package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    @Override
    public void remove(Long id) {
        //构建条件构造器
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        //添加查询条件,根据dish的CategoryId进行查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);

        //执行查询
        int count1 = dishService.count(dishLambdaQueryWrapper);
        //查询当前id是否关联菜品，如果关联则抛出业务异常
        if (count1 > 0){
            //已关联，抛出异常
            throw new CustomException("当前分类已关联菜品");
        }


        //构建条件构造器
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        //添加查询条件,根据setmeal的CategoryId进行查询
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        //执行查询
        int count2 = setmealService.count(setmealLambdaQueryWrapper);
        //查询当前id是否关联套餐，如果关联则抛出业务异常
        if (count2 > 0){
            //已关联，抛出异常
            throw new CustomException("当前分类已关联套餐");
        }

        //若没有关联，则正常删除
        super.removeById(id);
    }
}
